Method for united correction of MIMO radar transceiving array errors

Abstract

The invention discloses a method for united correction of MIMO radar transceiving array errors, wherein the method can improve array error correction precision. Echo signals of an antenna array are obtained, the echo signals are utilized to construct a receiving array covariance matrix and a transmitting array covariance matrix, the covariance matrixes of both a receiving array and a transmitting array are utilized to respectively correct the received and transmitted array errors, angular measurement inaccuracy caused by array errors is avoided, and the array errors of the receiving array and the transmitting array can be simultaneously corrected; orientation dependence occurs in an array guiding vector due to the array errors in collection, the antenna array rotates through J angles by enabling the antenna array comprising M array elements to be arranged on a turntable, the echo signals of the antenna array at each angle are respectively received, sample data of plenty of orientation angles of a plurality of orientations can be collected, and array error correction precision is improved. The method is suitable for being popularized and applied in the field of array signal processing.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to a joint correction method for MIMO radar transceiver array errors. Background technique [0002] MIMO (Multiple-Input Multiple-Output) radar is a multi-channel radar system, including a multi-element antenna structure, using multiple antennas to transmit signals, and using multiple antennas to receive echoes. The radar signal form And the system constitutes flexible and easy to expand. At the transmitting end of the MIMO radar, each array element (or sub-array) transmits mutually orthogonal signal waveforms omnidirectionally. Since the orthogonal waveforms cannot be coherently superimposed in space, a wide transmitting beam will be formed, thereby making the signal anti-intercept ability enhanced. At the receiving end of the MIMO radar, the echo signal is synthesized by the delay of all signals, and the orthogonal components in the echo signal are separated by a matched f...

AI Technical Summary

Problems solved by technology

[0003] In the MIMO radar system, the estimation of signal direction of arrival (DOA) usually adopts the high-resolution spectrum estimation method represented by the multiple signal classification method (MUSIC). Although this type of method has high resolution and estimation accuracy, but The premise of use is that the array flow pattern is accurately known. Due to the influence of various non-ideal factors, such as machining errors, inconsistent receiving channels, and array element mutual coupling, etc., the array flow pattern will have a certain degree of deviation and disturbance. As a result, the performance of the high-resolution spectral estimation method will seriously deteriorate, or even fail.

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